Concealed-nail joint for sheet-metal roofing.



C. B EDWARDS.

CONCEALED NAIL JOINI FOR SHEET METAL ROOFING.

APPLICATION FILED JULY 26. 1915.

Patented APR-1Y1, 1916.

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TED STATES PATENT OFFIGE.

CHRISTOPHER B. EDWARDS, OF COVINGTON, KENTUCKY, ASSIGNOR TO THE MOESCHL-EDWARDS CORRUGATING COMPANY, OF COVINGTON, KENTUCKY, A CORPORATION OFKENTUCKY.

Specification of Letters Patent.

Patented Apr. 11, 1916.

Application filed July 26, 1915. Serial No. 41,977.

To all whom it may concern:

Be it known that I, CHRISTOPHER B. EDWARDS, a citizen of the UnitedStates of America, and a resident of Covington, in the county of Kentonand State of Kentucky,

. have invented a certain new and useful Improvement in Concealed-NailJoints for Sheet-Metal Roofing, of which the following is aspecification.

. view and at the same time reduce leakage at that point to a minimum,assuming that any leakage could result owing to the hole produced indriving the nail.

' A very important object of the invention, as well, is the materialsaving of considerable metal that has heretofore been necessary in thelaying of a crimp-joint in which an extra allowance of material has beenmade in providing a foot-hold for the nail within or beneath the jointand in direct contact with the sheathing, the short and narrowindependent transverse strips of metal required in producing myindividualnailconcealing-caps being well adapted to be made from smallpieces of metal or practically valueless scrap and thus, also, reducingthe wasteand cost of material to a decided minimum.

, The details of structure in connection with various analogous forms ofmy invention herein will be fully hereinafter described in connectionwith the accompanying sheet of drawings, in which latter,

Figure 1 is a transverse section of a crimpjoint of sheet-rnetalroofing, embodying my invention herein showing one form of my cappingand concealing strip in normal, horizontally-extended position ready forbending or folding over on the head of the nail, which latter has beendriven into fastening-place through the apex of the joint into thesupporting-sheathing below; Fig. 2, a view similar to Fig. 1, butshowing my said capping and concealing strip bent and folded over thehead of the nail into covering and concealing position; Fig. 3, a viewsimilar to the preceding two views, but

. showing a slight variation in the placing of the usual lead-washer,the latter, in this View, being in contact with the upper surface of thecapping-strip, while in the preceding two views said lead-washer is incontact with the lower face of said cappingstrip; Fig. 4, a transversesection similar to the preceding three views, but showing mycapping-strip in its preferred form unaccompanied by a lead-washer orany other washer, but intended as being made of a thick strip of leaditself so as to discard the use of a washer; Fig. 5, a transversesection similar to the preceding views, but with my capping-stripprovided with a fold or hookformation along its lower edge that isadapted to engage beneath the lower edge of the lapping-member of thecrimp-joint and with its free end extended upwardly ready for bending orfolding down upon the fastening-nail head, the nail not being driventhrough the capping-strip in this instance but provided with alead-washer between its head and the apex of the joint; Fig. 6, a

view similar to Fig. 5 and of its same struc- Y ture, but with thecapping-strip bent and folded down in concealing and protecting positionon the driven nail head; Fig. 7, a transverse section, simliar to Figs.5 and 6, with the nail driven direct into the apex or crown of the jointand with a similar capping-strip, but with the lower inwardlyturned hookend thereof engaging a slit or narrow slot made in the outerlapping'member of the crimp-joint and showing the upper or free end ofthe capping-strip bent over and folded down upon the head of the nail inthe same manner as shown in Fig. 6; Fig. 8, a view similar to Fig. 7,but with my capping-strip having its lower end bent so as to enter theslit or narrow slot in the outer-member of the lapping crimp-joint andthen bent into outwardly-disposed hookform so as to engage the loweredge of said outer-member of the crimp-joint on the outer face thereof;Fig. 9, a fragmentary plan view of Fig. 1; Fig. 10, a fragmentary planview of Fig. 3; Fig. 11, a fragmentary plan view of Fig. 4:, which ispractically the same as Fig. 9, but with an oval-shaped capping-strip;Fig. 12, a fragmentary plan of Fig. 6; Fig. 13, a fragmentary plan ofFig. 7 and Fig. 1 1, a fragmentary plan of Fig. 8.

In Figs. 1 to 8, both inclusive, 1 indicates the ordinary sheathing; 2,the fastening. nail; 3, the lead-washer; 1, the body-portion of one ofthe roofing-sheets having the lower or lapped member of the crimp-joint;5 the next adjacent roofing-sheet that has the usual inverted-V-shapeouter or lapping member of the joint; and 6 the nail-head. In theseviews, I have shown for example and convenience, a lapped crimp-joint,whose lower or lapped member is composed of a slanting part 7, aguttered or channeled apex or crown 8, a slightly slanting part or leg9, a gutter or base 10, and an upwardlyturned, slanting flange 11, andwhose upper or lapping member is composed of an inclined or slantingpart 12, a horizontal apex or crown 13 and an inclined or slantingouter-limb 14, that are adapted to fit snugly in place upon said loweror lapped member. Of course, it is not essential to make the crimp-jointjust as I show it, but it is desired that it have an elevated apex orcrown, with sloping sides and an internal stifiening or supporting,approximately perpendicular member to provide for the driving of thenail through the said apex or crown. whereby both lapped-members of thejoint are pierced by the nail mid-width of the joint.

In Figs. 1 and 2 I have shown one form of my nail protecting andconcealing device, and in which the lead-washer 3 lies between the inneror fastening end of the narrow, or short, transverse concealing-strip 15and in contact with the apex 18 of the lapping-member of the joint, thehead 6 of the nail lying in contact with the outer face of the saidfastening-end of the concealing-strip. The said lead-washer is thusconcealed beneath the strip 15 when the latter has been bent over thenail-head 6 along the line 16 and thence over the opposite edge of thenail-head along the leadwasher and with its outer end lying in contactwith the member 14 of the lapping-member of the joint, as best shown inFig. 2. In Fig. 3, I show how the said lead-washer is arranged on thenail-shank directly be neath the head of the nail and on top of the saidfastening-end of the concealingstrip 15, the outer,horizontally-disposed, free-end of said strip 15 being adapted to bereadily bent and turned over the Washer and nail-head, the same as inFig. 2, but with the said fastening-end of the strip beneath saidwasher.

In Fig. 4: I show my preferred form of device in which a thickened stripof metal 15 is used to serve as a concealing one, its inner or fasteningend being in contact with show the concealing-strip asit appears i .toengage beneath the lower edge of the outer-member 14 of thelapping-member of the joint, and the upper end of the strip is passedonward over the nail head, to lie flatly in contact therewith and thenceis turned in a slanting manner downwardly until its free end rests incontact with the outer face of the slanting member 12 of saidlapping-member of the joint. In Fig;

5, however, I show how the free-end of the strip 15 extends upwardly andin position ready for bending or turning down upon the nail head, asseen in Fig. 6. p

In Fig. 7 I have shown the concealingstrip 15 of the same form as thatseen in Figs. 5 and 6, but the lower hook-end 17 is shown in engagementwith a slit or narrow slot 18 made parallel and close to the loweredgeof the outer lapping-member 1 1 of the joint; and in Fig. 81 have shownthe said concealing-strip as being made with a hook-formation 19 that isdisposed outwardly and has anelbow 20 therein, such elbow passinginwardly through the slit or narrow slot 18 made in the outerlappingmember 14 and with said outwardly-turned hook-formation 19engaged under the lower edge of said lapping member 14 for securing thesaid concealing-strip in place on the joint coincident with afastening-nail 2. In each of Figs. 5, 6, 7 and 8, the leadwasher 3 isshown between the nail head and the apex of the joint, and the upper orouter free-end of the strip 15 in each of the views 7 and 8 is lapped orfolded over the nail head in the same manner as seen in Fig. 6.

It will be seen. that there is but a slight variation in connection witheach of the means of fastening one end of the concealing-strip to thejoint, whether direct to the joint itself orto the fastening-nail andall as;

these forms are believed to be comprehended under the preferred formshown in Fig. tand being under claim 1 that shortly follows herein.

In the plan views, 9 to 14, both inclusive,

sidered as giving a little more attractive apiii-2H pearance to the roofwhen finished than the rectangular form of the other views. The planviews, Figs. 9 to 11, both inclusive,

normal position ready for bendingor fold ing into concealing positionover the nail head in each view, and the plan views, Figs. 12 to 14,both inclusive, show the concealingstrips in their final seating orconcealing position upon the nail head in each view.

Although the nails used in connection with sheet-metal roofing areroughened or barbed at their lower pointed ends and thereby intended tohold firmly from accidental withdrawal from the sheathing, it isreasonable to assume and state herein that the cap ing or concealingstrips shown are each adapted to aid in preventing the displacement orloosening of thenails;

The metal used in the short, narrow transverse concealing-strips canordinarily be taken from small pieces of scrap material,

although it is obvious it can be made from any strips of sheet-metal ofsuitable Width and out down to the desired narrow lengths so as toproperly lap or fold over the nail I claim 1. In a lapped,inverted-V-shape crimpjoint for sheet-metal roofing having a series ofspaced fastening-nails driven through the apex or crown thereof into thesheathing beneath, a similar series of elongated, narrow, transverse,independently-arranged fiat plates or strips of flexible sheet-metaleach of which is adapted to be fastened at one end of the crimp-jointbut with its re maining length free to be bent over and laid down uponthe said fastening-means for concealing the latter and providing aleakagecover for it. either with or without a washer.

2. In a lapped, upright crimp-joint for sheet-metal roofing having aseries of fastening-nails driven through the apex or crown thereof intothe sheathing beneath, a similar series of narrow, elongated,transverse. independently-spaced fiat strips of flexible sheet-metaleach of which is adapted to be connected at one end to the apex of thecrimp-joint by means of one of said fastening-nails but free theremainder of its length to be bent over and laid down upon the nail-headfor concealing the latter and covering it to avoid leakage around thenail where it enters the joint.

CHRISTOPHER B. EDIVARDS.

Witnesses:

JOHN ELIAS JoN'Es, BERL B. RIGDON.

